stopped, temporarily, indefinitely is what we know. melissa lee joins our special coverage on the manhunt for the remaining prime suspect in the boston bimings. pretty extraordinary here we are, so many hours after learning who the suspects were that we still do not have that suspect. >> it seems like we are suspended in time, maria, in terms of the developments of this story and the progress being made to apprehend that one suspect. and you also have to wonder, as night begins to descend on boston, if the odds are starting to go into the favor of the suspect as opposed to law enforcement and if darkness will play into the hands of law enforcement or if it will help the suspects get away. >> the two suspects identified as brothers from chechnya, the surviving suspect, 19 years old. the two have been living in cambridge, massachusetts. the older brother, who, of course, is dead, has been living in america since 2007. pretty extraordinary, living in this country since 2007 and deciding at some point to turn

on america. >> right. and the younger one getting a scholarship for a prestigious school in cambridge. an angel, said his father. that plays into this very elaborate plot, it seems, at this point. >> we are waiting on a news conference on the bombing manhunt. of course, we will bring you the latest. and, of course, all of this has sent boston and the region into a grip of an emergency and a complete lockdown. let's get to sue herera. chef has the very latest developments on what we know right now. sue? beginning to piece together and find out some of what the authorities have found as they work through watertown and also, as they work through the cambridge apartment and the location where the two brothers lived. they are telling nbc news that they have found numerous pieces of evidence that are being recovered, both from the watertown scene, which would include evidence of homemade

explosives including pipe bombings. they found another pressure cooker, as well as more than 200 spent rounds. the cambridge site is now secure and is clear. they are saying they did not have to detonate that explosive device that they had alluded to earlier in the day. they made a big point of telling the press earlier that they were going to have to detonate an explosive device and not to misinterpret what that was. it that are now saying they did not have to do that. they thought that a car in that particular area of cambridge might have had an explosive in it, but it did not. and they did not want to comment any further on what they found there. so, we're beginning to see some of the evidence, or hear about some of the evidence that the authorities are found. and they've also found as many as seven improvilzed explosive devices between the watertown site and the cambridge site. maria and melissa, back to you. >> all right, thank you. >> joining us on the phone,

former state department special agent and the vice president of analytics for stratfor. scott, thank you for being with us. we're waiting for a news conference, forgive us if we have to jump away. we're learning about some of these details, the seven improvised explosive devices what is your assessment of these suspects and what their broader plan was and whether or not they had accomplices? >> well, i think it's important to recall that these people, and especially when we're looking at the devices, that they are very simple devices to make. they really didn't show a lot of terrorism tradecraft. if you are a professional terrorist operative, the last thing you do is run into the 7-11 and try to hold it up in order to get money to get out of town. so, these guys -- >> we believe that incident -- that incident is unrelated, so, the 7-11 incident, we are being told that is unrelated, scott. >> okay. >> but they did stop to buy gasoline and they were, you

know, seen buying the gasoline. we do have a photograph of the younger brother. and that's the question i have, i mean, the fact that they're chechen, okay, that sets up some preconceived notions about what their message may be or their motivation or whatever. the methodology, that may fit. what doesn't fit are these two young men who at times made some very amateurish decisions and acted in ways that you don't normally see, when you're lo looking -- >> these are guys, and it's very important to remember, we have the chechen link, they are really americans. they moved here when they were little kids. they have grown up within the community. these are the types of people that al qaeda and their franchises have been trying to radicalize and equip over the internet, through things like -- >> so, what is it they can tell these young men who are in america, have lived in america, what can they tell them, possibly, to get them to carry

this out? is it just pure ideology? is that what it takes? >> well, they have this narrative that the west is attacking islam and they get these people to buy into it. a lot of times, these kids get kind of marginalized. sometimes they kind of grow up in a more secular environment and start to come back to their islamic roots and kind of be sucked in, you know, to this radicalism. and then we see them go off and, you know, start reading things, you know, these jihadi chat boards and things like "inspire" magazine. >> it is your sense, scott, that the older brother, the dead brother. he left the country for six months, apparently went back to russia. is it your sense that he took time, living in america since 2007, took time for six months to go to a training camp? >> it's very likely, but there, again, based upon the tradecraft we saw in the cown instruction of these explosive devices, even if he did training, it was likely some sort of basic training. they teach them to shoot aks and

gum over hurdles. he was not a professional. he probably did not go to the advanced terrorist tradecraft-type camps. >> scott, you must be amazed that this one suspect, the 19-year-old, is still at large and is p has basically shut in entire city -- >> he's amateur as far as terrorist tradecraft, he grew up in this area. he probably played hide and seek in these neighborhoods. he's playing hide and seek with the authorities now. >> we could call him amateur, but the fact is, three people are dead, more than 170 people are injured, many of whom are inju injured very seriously. so, i mean, the idea of a broader network, in chechnya -- >> this is -- this is not linked to professional overseas type operatives. they would have used, you know, much better explosive devices. we're fortunate these guys were not well trained. they were not able to make military grade-type explosives. they were not able to make a car

bomb. these were very small devices and we're very fortunate that's all they were able to do. >> scott, thank you for your insight here. scott stewart, we appreciate it. jamie fox, professor at northeastern university. he's a former consultant to the department of justice and worked on many major crime invest games. jamie was prepared to two to a studio to talk to us, but since boston is still on lockdown, we have him on the telephone. jamie, thanks very much. >> sure. >> why didn't they run right after the bombings? does that tell you that they weren't finished? why not leave boston immediately? they're in watertown, we hope, anyway. >> well, they didn't think they would get caught. i agree with scott that these were not sophisticated individuals and they certainly weren't part of a larger group, because they didn't have any money. so, they weren't real careful about not being seen. if they were shrewd, the younger

brother would have worn his baseball cap forward, not backwards. they would have worn sunglasses. they would have taken steps not to be identified in any recording. but they didn't. so, they were fairly amateurish. now, what's also important to understand is the relationship between the two of them. that often times, you have individual -- as individuals, they may not have a proclivity to violence, but together, they bring out the worst in each other. >> so, at this point, with one of the brothers dead, does that mean that the younger brother may not have the where with all or the spirit to continue on? that he will, in the end,e captured? >> well, i think he probably has the spirit not to get caught, at this point. but yes, without his older brother, who likely was the leader, he's probably feeling quite lost. and we don't know where he is. i mean, he -- very possibly could have gotten out of the area. and now that it's going to get

dark soon and it's raining here, who knows if he's gone far away. we don't know. as scott said, he could be hiding under our noses. but we just don't know that. >> but where he could have gone? the whole city is in lockdown. you have the faa instituting a no fly zone. amtrak shut down from new york to boston. so, what you're telling us is, its could be he's in connecticut or new york. >> well, could be. could have stolen a car. we just don't know. remember, the shootout with the police happened under the veil of darkness. then he drove off, driving over his brother, and then ditched that car. from that point on, the police didn't see him. so, i don't know where he is. and i think if the police knew where he was, they would be there right now, as well. >> right. >> let me say one other thing. people say, why did they not harm the man whose car was -- who they car jacked, and i think it's a very important reason why

they didn't. they established a round with this guy, though it was a very brief one. he was a person. where as all the other people they targeted on monday, at the marathon, they were anonymous, faceless entities. it's a lot easier for criminals to target and kill those they don't even see. >> bill? >> yeah, i -- you know, senator mitch mcconnell said the other day, jamie, that this is an example of how complacent we've become with our security. are we going to have to tighten security on events like the boston marathon in the future? do we need to step up security down the road or do we just have to live with this in the future? >> i think we would prefer to live with this in the future. i'll tell you why. the boston marathon is an open air event. there's no way that we can check people's bags, because there's no entry point. unlike a stadium, where you can, indeed, search everyone who goes

in through the gate. the only alternative is not to have outdoor events. but we always will. there will be outdoor concerts, races. we have to continue to live our lives. the worst thing that we can do is to aid and assist terrorists by taking away all of our freedoms voluntarily. >> professor fox, thank you for joining us. we appreciate it. james fox of northeastern university. the marathon bombings manhunt continues in boston and so does our continuing coverage. >> up next, homeland security expert michael balboni talks with us about possible next steps in this manhunt. stay with us. humans. sometimes, life trips us up. sometimes, we trip ourselves up. and although the mistakes may seem to just keep coming at you, so do the solutions. like multi-policy discounts from liberty mutual insurance. save up to 10% just for combining

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welcome back. we want to bring in former new york state new york michael

balboni. he was named chairman of new york's homeland security committee following 9/11 is now is a senior fellow at the homeland security policy institute. what are your thoughts now? >> what's happening now is there really is no timeline. i know that everybody is very anxious to see this guy and it's very hard to imagine that with all these assets and some what tight area, as it were, why you can't find this guy, but i know from experience that these types of manhundredths, there's really no playbook here. the case in 2007, they had a guy named bucky phillips in upstate new york. he alluded thousands of law enforcement auchlsofficer s for and weeks. we hope we're going to find this guy. but it's very likely that either he found a way to get out or he's found some place that the police just haven't been able to find yet. and so it's going to take a very

methodical and very tension-filled search that's going on right now. >> so, michael, is there not a critical time frame in which, you know, for the first x number of hours it is more likely that you'll apprehend somebody and as time goes on it is less likely? >> it really depends on the geography you're looking for. obviously woods versus an urban setting versus a suburban setting. a lot of nooks and crannies in houses. perhaps concealment opportunities. and it just takes a long time. but here's -- here's the point we should watch. at a eacertain point in time, f the commander at the scene, when do you say, all right, let's expand the search, and when do you talk the assets and move them some place else? that's a very important decision and tough decision to make. >> bill? >> and that's the question i was going to ask you, is, how long do you keep the lockdown in place? you have a massive area here with a lot of people in lockdown mode right now. what if you don't find him for several hours or even beyond?

>> that's -- that's a great question. again, that's that moment, a tipping point. that's why these folks take on such responsibility. because when you make that call and you now say, okay, you can come out of your house, now begin to resume your normal activities, let's keep watching, god forbid something happens. god forbid there's an opportunity to escape that didn't exist before. at a certain point in time, they work off of grids and they'll knoll what they've gone over. and then they'll have a rapid response team to be able to respond to anything, any intelligence they get from the field. they'll maintain that. so, at a certain point in time, they can begin to clear things, but as it becomes nighttime, right now, the weather changes, both, you know, maybe you drive him out from where he is, if he's outside or some place that's not sheltered. but at the same time, you probably don't make the decision to go, to let anyone do anything else until the light of day, which probably means although 12 hours. >> michael, thank you for your time. >> thank you, sir.

>> special coverage of the manhunt for the prime boston bombing suspect continues. >> the drama has been unfolding all day. we have more live continuing coverage right here next. stay with us.

welcome back. our full team coverage of the manhunt for the prime suspect in the boston bombings continues. bill griffith is in boston tonight. he's live on the ground in watertown, massachusetts, melissa lee also with me right here. bill, what can you tell us in terms of the scene right now? melissa making the point earlier that as we turn, the weather and the darkness comes and it turns to nighttime, doesn't that make things harder to capture this individual? >> as jamie fox pointed out, as it gets darker, or, i guess it was mike said that, as it gets darker, they have to make that decision. there's a storm front making its way in here very slowly, as well. it's going to get dark.

they will have to make a decision at some point. this news briefing, as they have been for the last few days here, they tell us a time and it keeps moving back. we're not complaining. we know they've got work to do. it's very important work to be done. and we keep hearing that now maybe it's going to be after 6:00 eastern time that we'll try to get some answers, but so far, these briefings have only been statements and then they leave without answering any questions. again, not a complaint, just an observation, because the work they're doing is so important right now. but it will be very interesting to see what decision they make and when they decide to make that decision, pertaining to the lockdown. because people have been in their homes and in their offices all day today. >> right, and mike balboni made that point, at what point do you say, it is the pitching point, in which people no longer have to be shut in their homes. what is the tipping point of which you say, you know what, we have to expand the search area here for this one suspect who may have evaded the authorities. >> exactly. >> and gone out of this area by this point.

>> as you well know, this is a highly populated area. not just watertown, not just cambridge, you know, all the areas around here is highly populated. he could be anywhere if they don't find him in watertown. and, again, it's back to door to door searches. that's the m.o. they've been using so far. >> you know, there's the question of what happens next. carl quintanilla joining the conversation, as well. i know you saw the media interviewing the father of these two individuals, also interviewed the uncle of these two individuals. the father telling the media that, he's asking his son to give up peacefully, but he's warning the u.s. that if his son is killed, quote, all hell will break loose. >> yeah. i think one of the most amazing dynamics of the entire story all day, and bill, brian, you all agree with me, is that the degree to which family members have been so vae call about what appears to be a dysfunction within the family. saying that this brings shame on the entire chechen ethnicity.

>> brian sullivan here, as well. and we're waiting on law enforcement officials to give us more details. but you at this point, all well know that is younger brother is still at large. dzhokhar tsarnaev at large in watertown, massachusetts, we think. >> you know, it's interesting. to follow up on what carl was just saying, when you read the profiles of the brothers, especially the younger brother, everybody says, he was a good kid. these are his classmates, it's not his family members who would expect to say that. we're going to dig in in the next couple of hours, what went wrong? what went wrong with this kid that everybody described as smart, athletic and a good kid, why did he snap, why did he change? >> living in america since 2007. at some point, deciding he wants to turn on america. carl? >> yeah, we are going to come right back with the latest developments in the hunt for the prime boston bombing suspect and

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you are looking at a live picture of watertown, massachusetts, we're expecting a press briefing by law enforcement in the next few minutes, ok, after a day that included one of the largest manhunts in history, the greater boston area remains on lockdown at this hour, as we head into nig nightfall, which is going to change the elements of this investigation. >> so many developments so far, very fluid story that we've been following. let's go to sue herrera with the latest developments. sue? all right, well, sue will join us later on with those developments, but as far as what we know right now, all of the city of greater boston remains shut in, essentially, residents still remain in their homes since early this morning -- >> that's right. law enforcement is going from

home to home, doing a check, looking for this younger brother, dzhokhar tsarnaev, one of the suspects, as you know. the older brother, dead, in a gun fight with law enforcement overnight. >> i love the point that you guys were making when carl and i jumped up here. how long do you require people stay inside their homes? you're talking about a metro area of 4 million people, 600,000 in boston proper. 90 square miles. how long do you have to remain in your home? >> and there have been estimates tonight of the cost, the dollar, nobody wants to talk about money right now, that's not the important thing, but the cost to the city, according to, i think business week tonight, $300 million for the week, so, the municipal tab is going to be huge. >> it seems like the only people that are out are two groups, law enforcement and the media. our man in the media, scott cohn is on the ground in watertown. have you heard anything about when people will actually be allowed back out of their homes to go about their business? >> well, that's one of the top things on the agenda for this news conference, which we've

been waiting to get under way, and i think part of it had to do with the fact that it's been raining here and they just a short time ago brought in a tent to cover the speakers for the news conference. so, hopefully they'll get on with it shortly. they say that the people here, particularly here in watertown, have been very understanding, very patient, even as very heavily armed officers, agents and so on went house to house, searching for the suspect in this. but yes, you know, time wears on and they have been locked in their houses since last night, really, and people coming to the door as early as the wee hours of this morning. so, everybody is waiting for that, for a lot of people, it's just hoping that they can get out. we saw some pe wal around in the city center of watertown, the town center, i should say, of watertown, a little bit. you know, walking their dogs and the like, but mostly it was a very, very heavy law enforcement presence. military presence,